Pull-socket.



Patented July 26, 1910.

1 rwerz his man

HENRY T. PAISTE, OF PHILADELPHIA, PENNSYLVANIA.

PULL-SOCKET.

Specification of Letters Patent. Patented July 26, 1910.

Application filed December 22, 1908; Serial No. 466,799.

To all whom it may concern.

Be it known that I, HENRY T. PAISTE, a

' citizen of the United States, residing in Philadel hia, Pennsylvania,have invented certain lhiprovements' in Pull- Sockets, of which thefollowing is a specification. 7

One object of my invention is to so arrange and construct the parts of alamp socket and of the, switch contained therein and forming partthereof, that the device as a whole shall be of a relativelyuncomplicated nature and not likely to get out of order or to requirerepairs.

I further desire to provide a special form of quick break'electricswitch for use as part of a pull socket, which, while being compact,shall be positive and reliable in action as well as of such aconstruction as to occupy but relatively little space.

These objects and other advantageous ends I secure as hereinafter setforth, reference beingl had to the accompanying drawings, in whic Figure1, is a side elevation of a pull socket constructed according to myinvention; Fig. 2, is a vertical section of the socket shown in Fig. 1;Fig. 3, is a vertical section taken on the line 33, Fig. 2; Fig. 4, is aside elevation of the body of the socket, the shell being removed; Figs.5 and 6, are vertical sections on the lines 5-5, and 6'6, Fig. 4; Fig.7, is a perspective view of the switch employed as part of the socket;and Figs. 8 to 12 inclusive are respective views of certain of thedetails of my invention.

In the above drawings A represents the casing of the socket whichconsists of a body portion a and a capo fitting together and held in thepositions shown by the screws, of which one is illustrated at 0?.

The interior of the body portion of the casing is lined with insulatingmaterial a and contains two blocks B and B of porcelain or othersuitable noncon .lucting ina tcrial, held together by screws 6 and b, of

' ,which the threaded end of the first engages a metallic plate 6whereby the Well-known threaded shell B for the rece tion of a ,lamp, isheld to the 'blockB';

the second of these screws enters a threaded opening in a terminal plateI) the. end of which extends down one side of the block B and is rovidedwith a screw 6 for the attachment of an electrical conductor; said screwserving to hold said terminal plate in no end of good electrical contactwith the metal of the threaded shell B As is understood by those skilledin the art, the shellB 'constitutes one of the socket terminals forengagement with the threaded base of an incandescent lamp, while a lateC, preferably ofgthe form shown in Fig. 9, is held to the block 13' by ascrew 0, so that it: extends from a central point at the bottomof theshell B to one side of said block, and is then turned at right angles toform the contact head 0 of the switch. The second terminal of the switchis provided by a plate D held to the block B by a screw d and projectingtoward the head 0 of the plate C at one side ofsaid block.

A spindle d (which also serves as a ter minal for the connection of asecond electrical conductor) is threaded immediately adjacent to itshead so as to be rigidly held by the late D, and extends transversely ofthe soc -et so that it lies'in or immediately adjaceht to the plane ofjunction of the two blocks B and B, its opposite end bein journaled in ametallic nut (Z rigidly-he ald between said blocks. Loosel mounted onthis spindle 11'" is an elongate sleeve E having a central squaredportion on which is a ratchet wheel 6 of (on-conducting material. Oneach side of this ratchet wheel are loosely mounted two plates 6', alsoof non-conducting material, and rigidly connected by a pin c" carrying apawl e which is dcsi ed to engage the teeth of said Wheel a. ThlS pawlhas connected to it a chain c, which extends from the recess within bloctsB and B in which the above noted pails are mounted, through anoutwardly flanged funnel shaped mouth piece (1 attached 16 the shell.

The sleeve E has at its outer end a collar 0 and carries justaiindei'said collar a metal- 'liowasher e which ipsts upon the bottom of headand the collar is mounted a substantially circular contact member F,which, being fitted tothe squared portion of the sleeve, necessarily hasto turn therewith. From Fig. 11 it will be noted that this memher isprovided with two upwardly projecting. tongues f 180 distant from ea hother, and since it is made of spring me a1, said tongues while beingfree to be ressed toward or'into the plane of its main portion,

tendto" occupy the positions shown, lmmediately under the head 0' of theplate C and 'minimum. Moreover owing to the peculiar also the body ofthe plate I) as well as in a projected position between said parts.'Said tongues are so proportioned or bent that their upturned ends bearagainst the under faces of the plate I) and the head a, when the contactmember F is in certain definite positions. It will be noted, however,that said plate I) is cut away at one side, and that the ratchet wheel 0is provided in the pres ent instance with four teeth. Moreover, there ismounted upon the spindle d between the nut and one of the plates 6 aspiral spring (1 whose ends are respectively fixed to said plate andnut.' Under operating conditions the spiral spring d maintains the twoplates 0' with their pawl e in such a position that a certain length ofthe chain 6* is drawn into the socket and rests upon the surface of theratchet wheel 0.

Assuming that one of the tongues f is in engagement with the under sideof the plate I) and the other is in contact with the under side of thehead 0; the outward pull of the chain c causes the pawl to engage one ofthe Four teeth of the ratchet 'wheel 0 and turn said wheel through anarc of 90, thereafter permitting the spring (1 to return the two plates0 with the pawl, to their normal positions, shown in Fig. 2. Thisquarter turn of the ratchet wheel causes turning of the sleeve E andwith it the contact plate F, so that while one of the spring tonguesstill remains in engagement with the under side of the plate 1), theother passes out fron1- under the head 0 and projects upwardly out ofcontact with the same, as shown in Fig. 4. The circuit through the plateD and the head (r' to the center of the lamp socket isthus broken,although another outward movement of the chain cwill cause the secondone of the spring tongues 'to pass from under said plate I) and permitit to spring up into engagement withth head 0, so that the circuitabovenoted is again completed.

By the arrangement above described, it will be seen that the wipingengagement of the spring tongues on the contact .plate F with the plateD and the head (1' insures at all times good electrical connectionbetween these parts while the arrangement of said parts is such that thelikelihood of loosening or breakage to any of them is reduced to aconstruction and arrangement of the tom ucs f and their cooperatingparts the circuit is rapidly broken and made thus avoiding in a greatmeasure all damage from burning of these parts.

l claim:

1. The combination in-a pull socket of a supporting structure having atransversely extending spindle; a ratchet wheel thereon; a pawl havingoperating means and placed to act on said wheel; a disk like structureattached to the ratchet wheel upon the outside face of the supportingstructure, and having a projecting contact; with a fixed con tact orcontacts extending adjacent said disk like structure also on the outsideface of the supporting structure so as to be alternately engaged by anddisengaged from the contact thereof when the pawl is operated.

2. The combination of a pull socket having terminals for connection to alamp; terminals for the attachment of conductors; means for permanentlyconnectr-g one of the conductor terminals with no of the lamp terminals;a ratchet wheel; a pawl having actuating means operative on said wheel;and a movable contact member con nected to the ratchet wheel andprovided with a projecting spring contact capablej'of being rotated fromthe ratchet wheel to alternately make and break the circuit between thesecond conductor terminal and the second lamp terminal.

3. The combination in a switch of a lamp terminal and a. conductorterminal; a spindle electrically connected to one of said terminals; a.sleeve rotatably mounted on said spindle; a ratchet. wheel and springcontact member both fixed to said sleeve; a pawl having operating meansand mounted so as to be capable of engaging the ratchet wheel; saidspring contact being placed to alternately engage and disengage thesecond of said terminals when the sleeve is turned.

4. A pull socket consisting of two bodies of insulating material, havinga chamber within them and provided with bearings; a spindle mounted insaid bearings between said pieces of material; a pawl and ratchetmounted upon the spindle within the chamber but rotatable independentlythereof; a spring contact tongue rotatably mounted on the spindle andoperatively connected to the ratchet; lamp terminals of which oneoverhangs the path of movement of the contact; means for connectingcurrent conductors to the spindle and to the other lamp terminal; andmeans for actuating the pawl.

5. The combination in a pull socket of an insulating body having arecess in one side and an interior chamber; a spind e extending throughsaid chamber into the. recess; a ratchet wheel of insulating materialmounted on the spindle within the chamber; a pawl'also in the chamberand operative on the ratchet; a disk on the spindle operativelyconnectet l to the ratchet, and having a spring tongue protecting fromits plane; and lamp terminals mounted on the insulating body in suchpositions that one of them overhangs the rece. 5 tl reof; with means foractuating the pa l to cause the spring tongue to be intermittently drawninto engagement with said overhanging contact and disengaged therefrom.

(i. The combination in a pull socket; of an insulating body having arecess in one side seem thereof; e 'piate a'mi a contaet overhanging.said recess; said contaethavmg a lamp teriminal eonnected'to it;a'second lamp tel"- minal; a conductor-terminal connected to the zseeondhunp terminal; with means for 'con- 1' of alternately engaging the plateand the qverhanging'contaet; with meane for intermittentlyroentgaidstzn'ctu re in there;

cess,

name to this specification, in the presence-of two subscribingwitnesses.

Witnessesz,"

- WILLIA BRADLEY,-

WM. A; BARB.-

In testimony ivhereo f, I I have flsignedim y.

" I JPAISTE'Q

